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Where is Upstream’s corporate headquarters?

890 Winter Street, Suite 200
Waltham, MA 02451

Where is the company incorporated?

Delaware

When was Upstream incorporated?

April 2021

When did Upstream go public?

Upstream’s shares began trading on the Nasdaq Global Select Market in October 2024.

What is Upstream’s fiscal year?

December 31

How is Upstream’s stock traded?

NASDAQ: UPB

When is Upstream’s annual stockholder meeting?

Once scheduled, our annual meeting date will be listed on the Events section of our Investors page each year.

Does Upstream pay dividends?

Upstream does not expect to pay cash dividends to its stockholders for the foreseeable future.

Does Upstream have a dividend reinvestment plan?

No

Does Upstream have a direct stock purchase plan?

No

Who is Upstream’s transfer agent?

Computershare Trust Company, N.A.

Whom do I contact with questions about my stock? How do I transfer stock, change the address on my shareholder account, or replace a lost stock certificate?

Computershare Trust Company, N.A.
150 Royall Street, Canton, MA 02021
+1 800.736.3001
+1 781.575.3100
www.computershare.com

Who is Upstream’s auditor?

PricewaterhouseCoopers LLP

Who is Upstream’s legal counsel?

Goodwin Procter LLP

How do I access Upstream’s whistleblower hotline?

Phone: 833-805-1073
Portal: https://www.whistleblowerservices.com/UPB